i actually solved this problem
the key lies in a formula that was quite difficult to find at first, but quite simple to use afterwards
c1/d1 = c2/d2, where the different concentrations and densities are due to the temperature difference
after that, the buoyancy correction equation is used...
it said 1.000 M KNO3. sorry for not specifying.. i was really tired when i typed it out.
i don't know either of these things that you mention. This is only my 2nd day in analytical chem, and this question was given to me as an assignment.
i also think the question is unclear.. but, obviously...
Homework Statement
you want to prepare 500 ml of 1 M KNO3 at 20 C, but your lab and water are 24 C. How many grams of solid KNO3 (density= 2.109 g/ml) should be dissolved in a volume of 500 ml at 24 C so that the concentration will be 1 M at 20 C? what apparent mass of KNO3 weighed in air is...
Homework Statement
At 318 K and 1.04 x 10-2 atm, the density of a gas is 1.75 x 10-5 g/cm3. (a) Find vrms for the gas molecules. (b) Find the molar mass of the gas.
Homework Equations
vrms= sqrt (3RT/M)
pV=nRT
pM=dRT
pV=(m/M)RT
The Attempt at a Solution
the main problem i...
Homework Statement
The thin uniform rod in Fig. 10-52 has length 4.0 m and can pivot about a horizontal, frictionless pin through one end. It is released from rest at angle θ = 40° above the horizontal. Use the principle of conservation of energy to determine the angular speed of the rod as...
Homework Statement
A flywheel turns through 22 rev as it slows from an angular speed of 6.5 rad/s to a stop. (a) Assuming a constant angular acceleration, find the time for it to come to rest. (b) What is its angular acceleration? (c) How much time is required for it to complete the first 11...
haha wow.. sorry about that
the vector notation didn't actually paste properly
and i really don't remember even learning the equation for a stretched spring, I'm just so lost
it no longer really matters, because the homework was already due
i just want to understand what's going on in the...
Homework Statement
A 1.8 kg block is initially at rest on a horizontal frictionless surface when a horizontal force in the positive direction of an x-axis is applied to the block. The force is given by F(x) = (7.6 - x2) N, where x is in meters and the initial position of the block is x = 0...
Homework Statement
A force of 4.7 N acts on a 17 kg body initially at rest. Compute the work done by the force in (a) the first, (b) the second, and (c) the third seconds and (d) the instantaneous power due to the force at the end of the third second.
Homework Equations
f= ma
p=fv...
oh, woops! i forgot to paste the rest :X
The scale of the figure's vertical axis is set by Ks= 8.0 J. (a) What is the magnitude of ? (b) What is the value of k?
sorry about that!